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Thread: Explain Tad woofers ???? Help.

  1. #16
    Administrator Mr. Widget's Avatar
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    Oh yeah, 12.5Hz sure.... and let's put a cute little wood horn on top of the machined horn on the ET-703... to do what exactly?

    While this system may sound fine, it appears to be designed to look impressive rather than be a functional design.


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  2. #17
    Senior Member rs237's Avatar
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    sorry,
    can someone explain to me how the efficiency of 106dB is to be achieved? The TAD 1601 has 97-97,5 dB efficiency.

    regards

    juergen

  3. #18
    Senior Member stephane RAME's Avatar
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    Quote Originally Posted by rs237 View Post
    sorry,
    can someone explain to me how the efficiency of 106dB is to be achieved? The TAD 1601 has 97-97,5 dB efficiency.

    regards

    juergen


    (97+97)=100 dB
    (100+100)=103 dB


  4. #19
    Administrator Mr. Widget's Avatar
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    Quote Originally Posted by stephane RAME View Post
    (97+97)=100 dB
    (100+100)=103 dB

    Ok... but not at 12.5Hz. I doubt it can do 95dB at 12.5Hz before self destruction.


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  5. #20
    Senior Member rs237's Avatar
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    Ok, then we would have 103dB. The addition 3dB for 2 Woofer and 6dB for 4 Woofer affects only the maximum sound pressure and not efficiency. The efficiency grad remains the same regardless of one , two or 1000 Woofer.

    regards
    juergen

  6. #21
    Senior Member richluvsound's Avatar
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    I know ,I Know !

    Quote Originally Posted by Mr. Widget View Post
    Ok... but not at 12.5Hz. I doubt it can do 95dB at 12.5Hz before self destruction.


    Widget


    Is the answer "SUPER GLUE" ?

    What do you reckon the volume of that cabinet is ?

    I like the little 2 way 2002 and 1102.

    Rich

  7. #22
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    The advertising department will know, may be it is the "subjectiv" efficiency. (Influenced by that design )
    ___________
    Peter

  8. #23
    Senior Member stephane RAME's Avatar
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    Quote Originally Posted by rs237 View Post
    Ok, then we would have 103dB. The addition 3dB for 2 Woofer and 6dB for 4 Woofer affects only the maximum sound pressure and not efficiency. The efficiency grad remains the same regardless of one , two or 1000 Woofer.

    regards
    juergen
    4430 = 93 dB -- 1 JBL 2235
    4435 = 96 dB -- 2 JBL 2234
    ????????

  9. #24
    Administrator Mr. Widget's Avatar
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    Quote Originally Posted by richluvsound View Post
    What do you reckon the volume of that cabinet is ?
    Bigger than a 4345.

    Quote Originally Posted by richluvsound View Post
    I like the little 2 way 2002 and 1102.
    It may be very nice, but I would go with TAD's own version. It has a more sophisticated horn. The JK speaker uses a simple plywood radial horn. Interestingly the JK speaker uses the same crossover point as the TAD. To be sure, the JK looks cooler, but I'd go with the sound.


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  10. #25
    Senior Member stephane RAME's Avatar
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    TAD TSM1

    TAD TSM1

    2 TAD 1601 = 98 dB
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  11. #26
    Senior Member rs237's Avatar
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    Hello Stephane

    This is OK. This is not the mistake at the efficiency of 3 dB for the second Woofer add.

    regards
    juergen

  12. #27
    Senior Member rs237's Avatar
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    Quote Originally Posted by stephane RAME View Post
    4430 = 93 dB -- 1 JBL 2235
    4435 = 96 dB -- 2 JBL 2234
    ????????
    The increased efficiency has been recognized by the 2234-founded. The 2235 has a heavier membrane (mass ring) and therefore a lower efficiency.

    regards
    juergen

  13. #28
    Administrator Mr. Widget's Avatar
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    Quote Originally Posted by rs237 View Post
    The increased efficiency has been recognized by the 2234-founded. The 2235 has a heavier membrane (mass ring) and therefore a lower efficiency.
    Not exactly true. The sensitivity does increase with added woofers. Take a look at the 4350 vs. the 4333. 95.5dB vs. 93dB. Here you have identical woofers, but you gain a bit of sensitivity due to mutual coupling.

    I doubt that the large JK system actually is 106dB, but then I doubt quite a lot about them.


    Widget

  14. #29
    Senior Member rs237's Avatar
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    Quote Originally Posted by Mr. Widget View Post
    Not exactly true. The sensitivity does increase with added woofers. Take a look at the 4350 vs. the 4333. 95.5dB vs. 93dB. Here you have identical woofers, but you gain a bit of sensitivity due to mutual coupling.

    I doubt that the large JK system actually is 106dB, but then I doubt quite a lot about them.


    Widget
    Hello Mr widget

    I am a different opinion. If I have a speaker with a 97dB/W/m Woofer, and give 1 watt performance in the box then, I have a sound pressure at 97db by 1m. If I have a speaker with 2 woofers have given each of the woofer only 1 / 2 watt. Each woofer produces only 94dB sound pressure. Both Woofer together again produce 97 dB SPL.
    I think that at the definition of 1 watt little problems. 1 watt is an 8 ohm Box at 2.88 volts. Many manufacturers are now simply measuring 2.88 volts. We all know that the speaker does not ohmic resistance. If the impedance measurement for now is only 6 ohms, we have not 1 but already watts 1.38 watts, and we have a higher sound pressure.
    Sorry for my bad english, its from online-translater.


    regards
    juergen

  15. #30
    Senior Member richluvsound's Avatar
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    2251.

    Widget,



    There is a pair for sale here in Europe @ 7000 euros . The horn is kinda ugly though. As the 1102 is NA would 1200 fe do the same job I wonder ?

    Rich

    Ps . I still have a workshop big enough

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